# Author:sp
# CreaTime: $(DATE)
# FileName: $(NAME)
# Description: simple introdution of the code
'''可变序列和不可变序列
'''
lst=[10,20,30]                   #可变序列
print(lst,id(lst))
lst.append(300)
print(lst,id(lst))
str='woshini'                  #不可变序列
print(str,id(str))
str=str+'baba'
print(str,id(str))